The word isometrics is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 16
Highest Scoring Words With Friends™ Play In The Letters isometrics
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Seven Letter Word Alert: (29 words)
corsets, cosiest, erotics, escorts, isomers, meiosis, meiotic, metrics, miscite, missort, misters, mistier, mitoses, mitosis, moister, mortise, mossier, oecists, rosiest, sectors, seismic, sitcoms, smiters, somites, somitic, sorties, stimies, stomies, stories